@RichFelker @mjg59 Now how do I update my bootloader? Or, on certain system configs, get/update time?
@oshepherd @mjg59 Alternatively some chipsets have a register to disable it which the kernel could use, if you trust it.
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@RichFelker@mjg59 there isn't an SMI pin, and firmware *correctly* blocks writes to that bit -
@oshepherd@mjg59 On early models (386-486 era?) there was a pin, and the disable register was available a few years back. -
@RichFelker@mjg59 since about Pentium it's been a bus cmessage. It has always been possible for SMM to disable the disable register -
@oshepherd@RichFelker@mjg59 why exactly is it possible for SMM to disable the ability to disable itsself? That seems silly/insecure. -
@bofh453@oshepherd@mjg59 Because Intel has a backwards model of which software is trusted and which is not.https://twitter.com/oshepherd/status/694194416303484928 …
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